Monday, April 27, 2009

Water, water everywhere

We signed up for an online video science class by that title through Here are some photos from some of the experiments we have done. This one is an air pressure experiment. We learned that 1 atmosphere is 14.6 pounds of pressure per square inch and that the air pressure will keep the water in a submerged glass and even push more water into it. The second photo is also the air pressure experiment.
We made a water clock last week. This photo shows the finished product held by YDS.
This photo shows the lines within the bottom cup. It took 90 seconds for water to reach the first line, another 60 seconds to reach the second line, another 105 seconds to reach the third. The total time it took for water to reach the third line was 4 minutes, 15 seconds.
We did an ice cutting experiment using dental floss and an ice cube. Unfortunately, the cut in the ice from the floss did not show up in the photos we took. It was fun to see the ice being cut by dental floss, though. We are looking forward to more experiments in the weeks to come.

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